FQL v4 will be decommissioned on June 30, 2025. Ensure that you complete your migration from FQL v4 to FQL v10 by that date.

For more details, review the migration guide. Contact support@fauna.com with any questions.

Create a document in a collection

Problem

You need to create a document in an existing collection in the current database.

Solution

Use the Create function:

client.query(
  q.Create(
    q.Collection('dilapidated_huts'),
    { data: { material: 'straw' } }
  )
)
.then((ret) => console.log(ret))
.catch((err) => console.error(
  'Error: [%s] %s: %s',
  err.name,
  err.message,
  err.errors()[0].description,
))
{
  ref: Ref(Collection("dilapidated_huts"), "300223085354680832"),
  ts: 1622573895720000,
  data: { material: 'straw' }
}
result = client.query(
  q.create(
    q.collection("dilapidated_huts"),
    {"data": {"material": "straw"}}
  )
)
print(result)
{'ref': Ref(id=300223090590220800, collection=Ref(id=dilapidated_huts, collection=Ref(id=collections))), 'ts': 1622573900720000, 'data': {'material': 'straw'}}
result, err := client.Query(
	f.Create(
		f.Collection("dilapidated_huts"),
		f.Obj{"data": f.Obj{"material": "straw"}},
	))

if err != nil {
	fmt.Fprintln(os.Stderr, err)
} else {
	fmt.Println(result)
}
map[data:map[material:straw] ref:{300223005074653696 0xc000180570 0xc000180570 <nil>} ts:1622573819180000]
try
{
    Value result = await client.Query(
        Create(
            Collection("dilapidated_huts"),
            Obj("data", Obj("material", "straw"))
        )
    );
    Console.WriteLine(result);
}
catch (Exception e)
{
    Console.WriteLine($"ERROR: {e.Message}");
}
ObjectV(ref: RefV(id = "300222988909806080", collection = RefV(id = "dilapidated_huts", collection = RefV(id = "collections"))),ts: LongV(1622573803740000),data: ObjectV(material: StringV(straw)))
Create(
  Collection('dilapidated_huts'),
  { data: { material: 'straw' } }
)
{
  ref: Ref(Collection("dilapidated_huts"), "302044124774662656"),
  ts: 1624310574250000,
  data: { material: 'straw' }
}
Query metrics:
  •    bytesIn:  105

  •   bytesOut:  198

  • computeOps:    1

  •    readOps:    0

  •   writeOps:    1

  •  readBytes:    0

  • writeBytes:  208

  •  queryTime: 37ms

  •    retries:    0

Discussion

The Create function needs both the Reference to a collection and the document’s data.

Is this article helpful? 

Tell Fauna how the article can be improved:
Visit Fauna's forums or email docs@fauna.com

Thank you for your feedback!